Pedros Crank Adjusting Cap Driver for Hollowtech2 Crank/BB Systems. This professional quality adjusting cap tool is used to install and remove adjusting caps of Shimano Hollowtech II crankbottom bracket systems. The unique dual-density screwdriver handle provides improved ergonomics and comfort while assisting in control of torque applied to the cap. Precision laser-cut tool bit is made from heat-treated tool steel for strength and durability.